<?php
function gzdecode($data){
$flags = ord ( substr ($data , 3, 1 ) );
$headerlen = 10;
$extralen = 0;
$filenamelen = 0;
if ($flags & 4) {
	$extralen = unpack ( 'v', substr ( $data, 10, 2 ) );
	$extralen = $extralen [1];
	$headerlen += 2 + $extralen;
}
if ($flags & 8) // Filename 
	$headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
if ($flags & 16) // Comment 
	$headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
if ($flags & 2) // CRC at end of file 
	$headerlen += 2;
$unpacked = @gzinflate ( substr ( $data, $headerlen ) );
if ($unpacked === FALSE)
	$unpacked = $data;
return $unpacked;
}
?>